My Goal: Add a button that will dim the background to a dark color so my monitor is not so bright when I play games.

The white background around my game puts a strain on my eyes, and I find myself resizing the window around the game width/height to expose more of my dark desktop to lower the white intensity. I visited Adult Swim's game zone where they include this feature, and I found it to be cool enough to not only remember to but to suggest to you.

This is an awesome idea! I have short-sightedness and when I look away from the screen dark blobs appear :c so i turned down the brightness which kind of makes the games less fun y'know? So having a setting to change the background darkness would be great!

I agree, but imho, it would be simpler just to change the white background to something less eye-hurting (black would be too much, but the forum background I see (dark blue) seems to do the trick well) globally.

Another way it could be done is to give each user an option in their profile to set background colour.

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